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1/30/2019 - Ok, obviously the BurnSim 4 announcement in 2015 was premature. :/ Life keeps intruding and I dont often have the time i want to put into BurnSim! Good news is a new release is getting close! The next update will include many bugfixes, some minor feature updates, and Metric Units! Stay tuned to Facebook and/or the announcements list, or keep an eye out here.

1/30/11 - Version 3.1.8 released!Click here for more info and to download free trial.

3/14/10 - Version 3.1.6 released!Click here for more info and to download free trial.

What is BurnSim?

BurnSim is a solid rocket steady-state ballistic simulation software package for the Windows platform.
In a nutshell, input your motor, nozzle and propellant characteristics
and BurnSim calculates the Kn through the burn and predicts
estimated chamber pressure and motor performance. Once your motor design is in BurnSim, you can
tweak the parameters such as nozzle diameter or grain core diameter and instantly see how the
Kn, chamber pressure, and motor thrust is affected. BurnSim will also optimize your nozzle design.

Motor designs in BurnSim can be saved and recalled for later use. In addition, test data can be imported and graphed alongside simulation data to compare sims to results. BurnSim allows you to make notes about your propellants and motor designs, all saved in one convenient location.

Once you're happy with the your motor design, BurnSim can then export a .ENG file for use in RockSim, wRasp or
other rocket flight simulators. You may also export the data to a text file (comma delimited) for use in virtually any system.
You can estimate your motor's performance and rocket's flight before you even cast a grain!

Features

Supports the following grain configurations in any number and combination:

BATES grains with 0-2 restricted ends

End burning grains (defined as BATES grain with zero diameter core)

Moon or Offset Core

D Grains

C-Slot

Finocyl

Star

X-Core

Different propellant types can be specified for each grain

Instantly see a graph of Kn, chamber pressure, thrust, and see how it changes when you change motor attributes.

Graph Mass Flux over the burn, a value that can be used to monitor erosive burning

Import test data and graph it along side simulations

Save your motor designs and propellant characteristics, as well as notes and imported test data

Export predicted motor performance into .eng files for use in Rocksim or wRasp

Export predicted motor performance into .csv files (comma delimited text files) for use Excel or any other program.

Thrust estimations based on nozzle geometry

Optimize your nozzle design for maximum performance.

Propellants can be defined with characterization data that changes over varied pressure ranges

Can't tell how ya much I've benfited from your new program. Did a lot
of mixing the last 2 weeks (over 75 lbs), and every motor I designed with the
aide of your BurnSim tool performed as predicted. On one flight I used your
.eng import feature for Wrasp, and my predicted altitude of 6281' was off 3
feet per Adept! Ya got a winner there ole buddy, thanks for your hard work.
As far as I'm concerned, I still owe ya one....

-Pat Gordzelik
President Tripoli Amarillo, L3CC, TAP

Future Features

Pressure drop (burnout or boost-sustain) transient simulation

Additional Grain types, requests?

Graphical grain iteration, allowing for any 2D grain shapes

3D grain burn simulation

Support for units other than English

Erosive burning predictions

Improved Printing of simulation data

Your suggestions!

Dont hesitate to contact me at BurnSim@blastzone.org
with any bug reports, suggestions or anything at all.

PLEASE NOTE!

BurnSim estimates chamber pressure and performance assuming steady state operation.
BurnSim (currently) does NOT take into account erosive burning effects
which can significantly raise chamber pressures in motors with high L/D ratios.
Test all motors in a safe environment, and always assume the motor can fail. Be prepared.

What does it cost?

A Personal license for BurnSim is only $39.
The Personal license entitles one person's use of BurnSim version 3.0, up to 5 installations / reinstalls. For multiple users, volume discounts are available.
Please contact us for details.

Please download BurnSim and try it out.
Thank you for your support, license fees cover the costs of continued development and improvements to BurnSim.

License fees may be purchased with via Paypal, or with a credit card, or check / money order.
Please go to the Secure Payment Page to purchase your license.